Exploited CVEs / VMware / CVE-2023-20867
CVE-2023-20867
VMware Tools Authentication Bypass Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2023-07-14 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Broadcom (VMware) Security Advisories, linked below.
Actively exploited VMware Tools vulnerability, Low severity, CVSS 3.9. Added to the CISA KEV catalog 2023-06-23.
Risk summary
Updated July 28, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2023-20867
A CVSS of 3.9, Low Severity, and yet on the CISA KEV list: this VMware Tools authentication bypass matters because of who used it and how. An attacker who has already fully compromised an ESXi host can make VMware Tools skip authentication of host-to-guest operations, quietly tampering with guest VMs in a way that evades in-guest monitoring. It is a stealth tool for attackers already inside the hypervisor, confirmed exploited in June 2023.
Do this: Update VMware Tools across guests and treat any evidence of ESXi host compromise as compromise of every VM on it.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2023-20867
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2023-20867
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2023-07-14 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2023-20867
The authoritative fix and affected-version list are published by the vendor. Find the Tools advisory on Broadcom (VMware) Security Advisories.
Common questions about CVE-2023-20867
Is CVE-2023-20867 actively exploited?
Yes. CVE-2023-20867 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2023-06-23, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 14%.
What is the CISA deadline and required action for CVE-2023-20867?
CISA set the federal (BOD 22-01) remediation due date at 2023-07-14, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2023-20867?
The authoritative fix is in the vendor advisory: see Broadcom (VMware) Security Advisories for the patched Tools versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2023-20867?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2023-20867's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
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